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Application of LiDAR technology in Vietnam

MINISTRY OF NATURAL RESOURCES & ENVIRONMENT REMOTE SENSING CENTRE. Application of LiDAR technology in Vietnam. Dr. Hoang Ngoc Lam MSc. Nguyen Thuc Anh Hanoi, 22 May 2007. Content. Technical details of LiDAR projects Project workflow & examples from current project

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Application of LiDAR technology in Vietnam

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  1. MINISTRY OF NATURAL RESOURCES & ENVIRONMENT REMOTE SENSING CENTRE Application of LiDAR technology in Vietnam Dr. Hoang Ngoc Lam MSc. Nguyen Thuc Anh Hanoi, 22 May 2007

  2. Content • Technical details of LiDAR projects • Project workflow & examples from current project • Applications of LiDAR data • Q & A

  3. Cantho: 1.800 km2 July 2006 Contractor: AAMHatch LiDAR system: ALTM 3100 C Airplane: ANTONOV 2 Flying speed: 180 km/h Flying altitude: 1500m Strip side-overlap: 25% GPS frequency: 1 Hz INS frequency: 200 Hz Scan frequency: 70 Hz Laser repetition rate: 70kHz Output: Laser points: Clasified Intensity image Quality control: 390 checking points by GPS RTK along roads RMSE: 0.14m Vinhlong - Bentre: 2.200 km2 May 2007 Contractor: GeoKosmos LiDAR system: ALTM 3100 C Airplane: ANTONOV 2 Flying speed: 180 km/h Flying altitude: 1500m Strip side-overlap: 30% GPS frequency: 1 Hz INS frequency: 200 Hz Scan frequency: 70 Hz Laser repetition rate: 70kHz Scale angle: 25 Point density: ~ 1m Digital camera: Rollei AIC modular LS 22Mp Focal length: 50 mm Scale 1:30.000 Ground resolution: 27 cm Output: Laser points: Classified Intensity image Simultaneously taken color air-photo Projects technical details

  4. Project workflow

  5. Vinhlong – Bentre LiDAR projectMay 2007

  6. Laser acquisition:Project design & GPS basestation

  7. Laser acquisition

  8. Post-processing:REALM: Strip trajectory

  9. Post-processing:PosPac: Estimated error & RMSE

  10. Filtering: TerraScan

  11. 1053 ground control points by GPS RTK Preliminary results: RMSE = 0.12 m Quality control

  12. Outputs: Laser points

  13. Outputs: Laser points with airphoto

  14. Outputs: Laser points with airphoto

  15. Applications • High resolution DEM generation: Integrated GIS for Mekong delta regional development

  16. Applications • 3D city model and urban management applications • DSM generation & Wireless communication management

  17. Applications:3D model with airphoto

  18. Applications:3D model with airphoto

  19. Applications:3D model with airphoto

  20. Other applications • Civil engineering & Infrastructure development • Corridor mapping • Spatial planning • Forestry applications • Flood monitoring • Landslide monitoring • Erosion monitoring • Coastline monitoring • Irrigation management • Coastline analysis and protection • Volumetric studies • Geomorphology & archeology

  21. Thank you for your attention!

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